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authorDavid Hendricks <dhendrix@chromium.org>2013-03-19 17:57:59 -0700
committerDavid Hendricks <dhendrix@chromium.org>2013-03-21 05:15:14 +0100
commit758abdd75b22108b14427edc3704a84783759c27 (patch)
treed1cb7a5330807761d434310a5b7faa3958206b8c /src
parenta54efdcf8cd8cc0f5f879fdf229b2e479bf0bcd1 (diff)
armv7: add a helper function for dcache ops by MVA
This adds a helper function for dcache ops by MVA which will perform the specified operation on a given memory range. This will make it more trivial to add other data cache maintenance routines. Change-Id: I01d746d5fd2f4138257ca9cab9e9d738e73f8633 Signed-off-by: David Hendricks <dhendrix@chromium.org> Reviewed-on: http://review.coreboot.org/2870 Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src')
-rw-r--r--src/arch/armv7/lib/cache.c28
1 files changed, 24 insertions, 4 deletions
diff --git a/src/arch/armv7/lib/cache.c b/src/arch/armv7/lib/cache.c
index d413bc4046..8fb238af9b 100644
--- a/src/arch/armv7/lib/cache.c
+++ b/src/arch/armv7/lib/cache.c
@@ -77,7 +77,8 @@ void icache_invalidate_all(void)
enum dcache_op {
OP_DCCISW,
- OP_DCISW
+ OP_DCISW,
+ OP_DCCIMVAC,
};
/*
@@ -169,13 +170,32 @@ static unsigned int line_bytes(void)
return size;
}
-void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len)
+/*
+ * Do a dcache operation by modified virtual address. This is useful for
+ * maintaining coherency in drivers which do DMA transfers and only need to
+ * perform cache maintenance on a particular memory range rather than the
+ * entire cache.
+ */
+static void dcache_op_mva(unsigned long addr,
+ unsigned long len, enum dcache_op op)
{
unsigned long line, i;
line = line_bytes();
- for (i = addr & ~(line - 1); i < addr + len - 1; i += line)
- dccimvac(addr);
+ for (i = addr & ~(line - 1); i < addr + len - 1; i += line) {
+ switch(op) {
+ case OP_DCCIMVAC:
+ dccimvac(addr);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len)
+{
+ dcache_op_mva(addr, len, OP_DCCIMVAC);
}
void armv7_invalidate_caches(void)